* Gets a ReadStream for /dev/tty when stdin is piped. * This allows interactive Ink rendering even when stdin is a pipe. * Result is cached for the lifetime of the process.
()
| 15 | * Result is cached for the lifetime of the process. |
| 16 | */ |
| 17 | function getStdinOverride(): ReadStream | undefined { |
| 18 | // Return cached result if already computed |
| 19 | if (cachedStdinOverride !== null) { |
| 20 | return cachedStdinOverride |
| 21 | } |
| 22 | |
| 23 | // No override needed if stdin is already a TTY |
| 24 | if (process.stdin.isTTY) { |
| 25 | cachedStdinOverride = undefined |
| 26 | return undefined |
| 27 | } |
| 28 | |
| 29 | // Skip in CI environments |
| 30 | if (isEnvTruthy(process.env.CI)) { |
| 31 | cachedStdinOverride = undefined |
| 32 | return undefined |
| 33 | } |
| 34 | |
| 35 | // Skip if running MCP (input hijacking breaks MCP) |
| 36 | if (process.argv.includes('mcp')) { |
| 37 | cachedStdinOverride = undefined |
| 38 | return undefined |
| 39 | } |
| 40 | |
| 41 | // No /dev/tty on Windows |
| 42 | if (process.platform === 'win32') { |
| 43 | cachedStdinOverride = undefined |
| 44 | return undefined |
| 45 | } |
| 46 | |
| 47 | // Try to open /dev/tty as an alternative input source |
| 48 | try { |
| 49 | const ttyFd = openSync('/dev/tty', 'r') |
| 50 | const ttyStream = new ReadStream(ttyFd) |
| 51 | // Explicitly set isTTY to true since we know /dev/tty is a TTY. |
| 52 | // This is needed because some runtimes (like Bun's compiled binaries) |
| 53 | // may not correctly detect isTTY on ReadStream created from a file descriptor. |
| 54 | ttyStream.isTTY = true |
| 55 | cachedStdinOverride = ttyStream |
| 56 | return cachedStdinOverride |
| 57 | } catch (err) { |
| 58 | logError(err as Error) |
| 59 | cachedStdinOverride = undefined |
| 60 | return undefined |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | /** |
| 65 | * Returns base render options for Ink, including stdin override when needed. |
no test coverage detected